Here's an excerpt from the Frequently Asked Questions:
From a library perspective, what does Evergreen do? What modules or components are available?
Evergreen currently has modules for circulation, cataloging, web catalog, and statistical reporting. Evergreen also supports the SIP2 protocol for self-check and Internet/computer access control.
What does it not do?
Evergreen's Acquisitions and Serials modules are currently under joint development with the University of Windsor. Other features on our roadmap include a Z39.50 server, and telephony and credit card support.